Who said Quantity has a quality of its own?

The phrase "Quantity has a quality all its own" is often attributed to Karl Marx, although it was actually first used by the Prussian military theorist Carl von Clausewitz. This concept emphasizes that sheer numbers or quantity can sometimes have a significant impact or influence, even if the individual quality of each unit is lower. In military strategy, this idea suggests that overwhelming numerical superiority can compensate for deficiencies in training or equipment.